Finding the Fourth Proportional to 22,738.16, 31,378.72 and 13,179.89

Step by Step Solution

1. Step 1: Write the proportion equation
   22,738.16 : 31,378.72 = 13,179.89 : x
2. Step 2: Convert to fraction form
   22,738.16/31,378.72 = 13,179.89/x
3. Step 3: Cross multiply
   22,738.16x = 31,378.72 × 13,179.89
4. Step 4: Simplify right side
   22,738.16x = 413,568,077.94
5. Step 5: Solve for x
   x = 413,568,077.94/22,738.16
6. Step 6: Final answer
   x = 18,188.28